Moulding the flow of phononic waves in three-dimensional (3D) space plays a critical role in controlling the sound and thermal properties of matter. To this end, 3D phononic crystals (PnCs) have been considered the gold standard because their complete phononic bandgap (PnBG) enables omnidirectional inhibition of phononic wave propagation. Nevertheless, achieving a complete PnBG in the high-frequency regime is still challenging, as attaining the correspondingly demanded mesoscale 3D crystals consisting of continuous frame networks with conventional fabrications is difficult. Here, we report that a DNA origami-designed-3D crystal can serve as a hypersonic 3D PnC exhibiting the widest complete PnBG. DNA origami crystallization can unprecedentedly provide 3D crystals such that continuous frame 3D crystals at the mesoscale are realizable. Furthermore, their lattice symmetry can be molecularly programmed to be at the highest level in a hierarchy of symmetry groups and numbers, which can facilitate the widening of the PnBG. More importantly, conformal silicification can render DNA origami-3D crystals rigid. Overall, we predict that the widest hypersonic PnBG can be achieved with DNA origami-designed 3D crystals with optimal lattice geometry and silica fraction; our work can provide a blueprint for the design and fabrication of mesoscale 3D PnCs with a champion PnBG.
Bibliographical noteFunding Information:
Research funding: This work was supported by Industrial Strategic Technology Development Program-Alchemist Project (20012390, 4D Molecular-Nano-Addressable Lithographic Self-Assembly) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea), future technology laboratory program (2022M3H4A1A02074314) funded by national research foundation of Korea (NRF of Korea), midcareer researcher supporting project (2019R1A2C2004846) funded by NRF of Korea, the ERC (DNA Funs, Project ID: 818635), and the NRF of Korea grant (2022R1A4A1034315) funded by the Korea government (MSIT).
© 2023 the author(s), published by De Gruyter, Berlin/Boston.
- complete 3D phononic bandgap (PnBG)
- DNA origami
- phononic crystals (PnCs)
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering